Set Custom Control Properites in Code-Behind

DolphinBay · March 31st, 2004, 02:04 PM

Good afternoon all,

In what seems like a never-ending quest to get my arms around ASP.NET I have new question. I am trying my hand at building a custom control, VERY basic in nature, to understand the concept. I am trying to use the Page_Load subroutine within a code-behind page to set two properties of the control. Despite my adding the control to the web-form, the code-behind page is not recognizing the control and I am getting "not-declared" errors. I have posted a code snippet below. Any help is appreciated.

Web-Form:
<%@ Register TagPrefix="myControls" Namespace="myControls" Assembly="ShowColor" %>
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="DisplayShowColor.aspx.vb" Inherits="learn.DisplayShowColor"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
    <HEAD>
        <title>DisplayShowColor</title>
    </HEAD>
    <body MS_POSITIONING="GridLayout">
        <myControls:ShowColor id="ctrlShowColor" Runat="server" />
    </body>
</HTML>

Code-Behind:
Public Class DisplayShowColor
    Inherits System.Web.UI.Page
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ctrlShowColor.Text = "Hello Ethan. Rise and Shine"
        ctrlShowColor.Color = "Orange"
    End Sub

End Class

Dolphin Bay, Inc. -- turning visions into eReality(tm) -- West Palm Beach, FL
Website Design, Internet Strategy, Search Engine Marketing

www.DolphinBay.biz

planoie · April 3rd, 2004, 08:35 PM

There is a problem with visual studio where adding a custom control (server or user control) to the form designer does NOT also add a declaration for that control in the code behind. So you will need to add it manually:

Protected WithEvents ctrlShowColor As myControls.ShowColor

You might need to change the control type.

Peter
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